<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>

    <div id="app">
        <input type="text" v-model="num"/>
        <button v-on:click="num++">点赞</button>
        <button v-on:click="cancle">取消</button>
        <h1>{{name}}，非常帅，{{num}}个人</h1>
    </div>
    
</body>

<script src="../node_modules/vue/dist/vue.js"></script>

<script>
    let vm =  new Vue({
        el: "#app",
        data: {
           name:"张三",
           num: 1         
        },
        methods:{
            //取消方法
            cancle:()=> {
                vm.num --;
                vm.num --;
            } 
   

        }
    });

    
    
</script>
</html>